Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.
Forces of gravity on protons and electrons
  • footballxpaul
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Help with gravitation of forces
  • cougarsoccer
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5
Lorentz Contraction and Chalk Guns
  • montreal1775
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6
PLEASE HELP 2 questions on thermodynamics I Cant get
  • Candycane2388
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Work Done on Thermodynamic Path ABCA: 5625 J
  • keemosabi
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2
Net Electric Field at 4 cm from a 40 nC Charged Particle A - Homework Solution
  • -EquinoX-
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16
Achieving an 895 km Orbit: Calculating v
  • phy_
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4
Physics 20-1 Final Review: Projectiles
  • physicznoob
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7
Circuit Analysis: Find i, v Given R1, R2
  • Xkaliber
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3
Conservation of Momentum Law- Recoil Velocity (Question)
  • seeindubble12
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Total change in entropy, what am I doing wrong?
  • asdf188
  • · Replies 7 ·
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7
Find the acceleration of the box.
  • rickylin89
  • · Replies 14 ·
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14
How Do You Derive the Compton Equation?
  • latitude
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1
Fluid Question and density tension etc.
  • amaris
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1
Find The Angle of The Electron; Motion of Charges
  • withthemotive
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3
What is the force on an electric dipole due to a line of charge?
  • KillerZ
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Total change in entropy, what am I missing?
  • asdf188
  • · Replies 1 ·
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1
Determine the length of the third segment
  • dnp33
  • · Replies 4 ·
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4
A few problems regarding motion
  • I R GOOD
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4
What Air Resistance Force Does a Car Face at 65mi/hr?
  • afg_91320
  • · Replies 8 ·
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8
Easy Conservation of Energy Problem
  • BioBabe91
  • · Replies 3 ·
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3
Charge enclosed in uniform electric field
  • yeahhyeahyeah
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1
What is the solution for the two motion problems?
  • ajenkin9
  • · Replies 6 ·
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6
Solve Centripetal Motion Problem: Find Tension & Acceleration
  • rickylin89
  • · Replies 11 ·
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11
Calculating the Uncertainty of a Pool's Volume
  • jumbogala
  • · Replies 1 ·
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1
Dont know how to word this properly, but a question on volume, flow, and psi.
  • SwGts
  • · Replies 1 ·
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1
Calculate the entropy change of the water while it cools
  • anubis01
  • · Replies 1 ·
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1
How much voltage is created when a magnet passes over a coil?
  • U4edot
  • · Replies 14 ·
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14
Which table will be more difficult to tilt? ~ PLEASE HELP ?
  • flabber
  • · Replies 2 ·
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2
Final Speed of an Electron with 22kv Potential Difference?
  • SCorneliusJ
  • · Replies 2 ·
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2
Solve 3D Vector Forces: F3, Alpha, Beta, Gamma
  • ur5pointos2sl
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Temperature Change in a Radiating Sphere with Increasing Radius
  • Feldoh
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2
Mechanics problem - centre of mass
  • thehammer
  • · Replies 1 ·
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1
Work/Energy and Parallel Current-Carrying Conductors (Conceptual Question)
  • nautikal
  • · Replies 1 ·
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1
A Sphere Oscillating in the Bottom of a Cylinder
  • hbweb500
  • · Replies 2 ·
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2
Rearranging the doppler effect formula to solve for Vs
  • hellokitty
  • · Replies 3 ·
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3
Minimum amount of hops for radiowave to travel from Amsterdam to Tokyo
  • Shukie
  • · Replies 3 ·
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3
Charge on inner surface of conducting shell
  • yeahhyeahyeah
  • · Replies 10 ·
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10
Calculating Electric Field of a Thin Rod of Length L with Total Charge Q
  • KillerZ
  • · Replies 9 ·
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9
Thin lens equation with multiple lenses
  • frank48
  • · Replies 1 ·
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1
Displacement Vector Homework: Magnitude & Direction
  • Kitty808
  • · Replies 3 ·
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3
Kinematics in 2d, plane drops an object
  • FlukeATX
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2
Mechanics - Work and Kinetic Energy question
  • thehammer
  • · Replies 8 ·
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8
So, in a way, they are inverse of each other.
  • viet_jon
  • · Replies 2 ·
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2
Energy in a spring system and static extension
  • nokia8650
  • · Replies 1 ·
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Rearranging Exponential Curve Equation
  • mandos
  • · Replies 3 ·
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3
Problem in physic of electric charge
  • lovelycecila
  • · Replies 1 ·
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1
Sound Intensity Help: Calculate Intensity & Level at 48m Mic Position
  • hellokitty
  • · Replies 1 ·
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Vector components in Polar Coordinate
  • changazi
  • · Replies 1 ·
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1
Help understanding the units in Gauss's law
  • goldenwest
  • · Replies 13 ·
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13
Find the Direction of Electric Field at X: Test Your Solution
  • -EquinoX-
  • · Replies 11 ·
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11
Determining g with a Compound Pendulum: Issues with Uncertainties
  • trelek2
  • · Replies 2 ·
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2
Resolve Kinematics Problem: x, h, g
  • FlukeATX
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3
Vectorial Algebra: Parallel, Perpendicular or Neither?
  • sdoyle
  • · Replies 1 ·
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1
What is the weight of two suspended conducting spheres with given charges?
  • Kudo Shinichi
  • · Replies 11 ·
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11
Calculating Force On A Dam, Using Pressure, Area, and other Known Values
  • Beginner@Phys
  • · Replies 2 ·
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2
Electric Field Strength between Two Infinite Lines of Charge
  • KillerZ
  • · Replies 9 ·
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9
How Do I Correctly Calculate Vector C Using Unit Vectors?
  • J89
  • · Replies 2 ·
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2
Calculating Electric Field from a Bent Rod of Charge
  • musicfairy
  • · Replies 2 ·
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Mechanics & physics,can anyone explain the scenarios?Very practical Questions?
  • flabber
  • · Replies 2 ·
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2
How Does Pressure Affect Seawater Density at Depth?
  • Beginner@Phys
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Average value of AC over a complete cycle is always zero
  • atavistic
  • · Replies 2 ·
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2
How Does a Hard Disc Drive's Magnetic Field Affect an Electron's Motion?
  • Zimtstange
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Pressure, force, and Area: Calculating the net Force Applied on A dam by Water
  • Beginner@Phys
  • · Replies 1 ·
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1
Using the momentum of the ball to find it's original height
  • deadtreforest
  • · Replies 2 ·
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Solve Integration Problem: a=(-2v)m/s^2, v=20m/s, s=0, t=0
  • yoleven
  • · Replies 3 ·
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3
Electric Field: Deriving Equations and Understanding Charge Density
  • musicfairy
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3
How Fast Must a Ball Be Kicked to Avoid Hitting a Hemispherical Rock?
  • Ailo
  • · Replies 18 ·
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What Is the Tension in the Left Rope When a Person Sits on a Supported Beam?
  • future_vet
  • · Replies 4 ·
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Solving the Mystery: A Helicopter's Dropped Package
  • intenzxboi
  • · Replies 2 ·
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Conservation of Momentum and gravity
  • jcjp
  • · Replies 2 ·
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Speed of electron in Bohr model
  • vaizard
  • · Replies 6 ·
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6
EMR & Magnetic/Charged Particle Interaction: Right or Wrong?
  • Precursor
  • · Replies 1 ·
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Net Electrostatic Force on particles
  • Aryth
  • · Replies 6 ·
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6
What Charge Value Would Keep the Moon in Orbit by Electrical Force?
  • acissej2487
  • · Replies 1 ·
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Coulombs Law, 3 charges 3 dimensions.
  • Oblivion77
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Wishing Well (sound wave) problem
  • becks723
  • · Replies 6 ·
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6
Is Homework Help Considered Plagiarism? A Scientist's Perspective
  • Crosshash
  • · Replies 5 ·
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5
What Is the Net Flux Through Gaussian Surfaces Near a Charged Rod?
  • musicfairy
  • · Replies 2 ·
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Nuclear Binding Energy: What Does it Really Mean?
  • Precursor
  • · Replies 11 ·
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11
Electrostatic Equilibrium: Where to Place a Third Charge?
  • endeavor
  • · Replies 4 ·
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4
Torque Experiment: Finding Mass 2 w/ Given Data
  • tsukasazero
  • · Replies 1 ·
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Sketching Electric Field Lines of Circular Arc w/ Uniform Charge
  • DWill
  • · Replies 1 ·
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Finding Velocity of a rock thrown into a well
  • Cheezay
  • · Replies 8 ·
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8
What Is Rosie's Power Output When Pushing a Box?
  • Yavko2510
  • · Replies 2 ·
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How Does Height Affect the Diameter of a Water Drop Impact?
  • DizzyDoo
  • · Replies 1 ·
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Where Will the Car Overtake the Truck?
  • mbecker19
  • · Replies 6 ·
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6
How Is Work Calculated When Pulling a Blimp with Drag and Angle Considerations?
  • hganser
  • · Replies 3 ·
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Understanding Derivatives, velocity and acceleration
  • intenzxboi
  • · Replies 3 ·
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3
Vector Question on Ropes: Finding Forces with Angles | Homework Help
  • J89
  • · Replies 3 ·
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3
Electric Field in a Non-symmetric Sphere (Purcell 1.16)
  • r16
  • · Replies 3 ·
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Eng. Mechanics I Bonus question
  • CJSGrailKnigh
  • · Replies 25 ·
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What is the speed of the bullet in a ballistic pendulum collision?
  • nns91
  • · Replies 2 ·
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Understanding Vector Products and Properties: Sorting Fact from Fiction
  • x^2
  • · Replies 3 ·
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How Do Units Affect Hydrogen Wavefunction Normalization in FORTRAN?
  • peanutbutter
  • · Replies 1 ·
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Calculating Force to Tip a Box Dragged Across Floor
  • Shiz
  • · Replies 2 ·
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Am i going about this correctly? momentum
  • Dell
  • · Replies 1 ·
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Finding an oscillator's period with a dataset in Mathematica
  • Shukie
  • · Replies 1 ·
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Ball Speed at Window Top from 38.8m Building: 13m in 2s
  • mbecker19
  • · Replies 1 ·
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How Do You Calculate the Total Displacement of a Car Accelerating Uniformly?
  • intenzxboi
  • · Replies 1 ·
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1